A buddy of mine got to scrap out a TT that had been abandoned a decade earlier. I got all the appliances from him and I've even used the AC on top of a previous TT that I know longer own.
When the trailer was abandoned food was left in the fridge. After 10 years it didn't even smell anymore. But, some of it had dissolved into the plastic of the fridge walls. Eggs left in the built in egg tray have their shells so stuck in the tray I can't get the shells to come out.
I never have tried the fridge out to see if it works. Maybe next year I will get around to that.